For building with firebricks, Vitcas Heatproof Mortar should be used.

Premium Black Fire Cement should be used wherever smoke, heat or fumes, are escaping from solid fuel appliances, fireplaces, gas cookers, stove sand rangers, central heating systems and boilers. It can also be used to repair fire backs, for jointing internal flue pipes and on all structures subjected to gas and temperatures up to 1250ºC, well in excess of any domestic application.

Premium Black FireCement should not be used as a fireplaces screed or render nor for barbecues or other outside applications. Use Vitcas Heatproof Screed to provide a protective rendering, resistant to temperature 1400ºC.